Liquid ring pump



FIG. 1 is a perspective view of a liquid ring pump showing our new design;

FIG. 2 is a left end elevational view thereof;

FIG. 3 is a right end elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a liquid ring pump, as shown. 